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SE98ATP Datasheet(PDF) 23 Page - NXP Semiconductors

Part # SE98ATP
Description  DDR memory module temp sensor, 1.7 V to 3.6 V
PDF  43 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

SE98ATP Datasheet(HTML) 23 Page - NXP Semiconductors

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SE98A_4
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 25 November 2009
23 of 43
NXP Semiconductors
SE98A
DDR memory module temp sensor, 1.7 V to 3.6 V
8.5.2 Lower Boundary Alarm Trip register (16-bit read/write)
The value is the lower threshold temperature value for Alarm mode. The data format is
2’s complement with bit 2 = 0.25
°C. RFU bits will always report zero. Interrupts will
respond to the presently programmed boundary values. If boundary values are being
altered in-system, it is advised to turn off interrupts until a known state can be obtained to
avoid superfluous interrupt activity.
8.5.3 Critical Alarm Trip register (16-bit read/write)
The value is the critical temperature. The data format is 2’s complement with
bit 2 = 0.25
°C. RFU bits will always report zero.
Table 14.
Lower Boundary Alarm Trip register bit allocation
Bit
15
14
13
12
11
10
9
8
Symbol
RFU
SIGN
LBT[9:6]
Reset
00
00
00
00
Access
R
R
R
R/W
R/W
R/W
R/W
R/W
Bit
7
6
5
4
3
2
1
0
Symbol
LBT[5:0]
RFU
Reset
00
00
00
00
Access
R/W
R/W
R/W
R/W
R/W
R/W
R
R
Table 15.
Lower Boundary Alarm Trip register bit description
Bit
Symbol
Description
15:13
RFU
reserved; always 0
12
SIGN
Sign (MSB)
11:2
LBT
Lower Boundary Alarm Trip Temperature (LSB = 0.25
°C)
1:0
RFU
reserved; always 0
Table 16.
Lower Boundary Alarm Trip register bit allocation
Bit
15
14
13
12
11
10
9
8
Symbol
RFU
SIGN
CT[9:6]
Reset
00
00
00
00
Access
R
R
R
R/W
R/W
R/W
R/W
R/W
Bit
7
6
5
4
3
2
1
0
Symbol
CT[5:0]
RFU
Reset
00
00
00
00
Access
R/W
R/W
R/W
R/W
R/W
R/W
R
R
Table 17.
Critical Alarm Trip register bit description
Bit
Symbol
Description
15:13
RFU
reserved; always 0
12
SIGN
Sign (MSB)
11:2
CT
Critical Alarm Trip Temperature (LSB = 0.25
°C)
1:0
RFU
reserved; always 0



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